From: Patryk Małek <patryk.malek@intel.com>
Date: Tue, 28 Aug 2018 17:16:03 +0000 (-0700)
Subject: i40e: hold the rtnl lock on clearing interrupt scheme
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=5cba17b14182696d6bb0ec83a1d087933f252241;p=openwrt%2Fstaging%2Fblogic.git

i40e: hold the rtnl lock on clearing interrupt scheme

Hold the rtnl lock when we're clearing interrupt scheme
in i40e_shutdown and in i40e_remove.

Signed-off-by: Patryk Małek <patryk.malek@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index c30feb27e1c0..112245f32d7d 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -14182,6 +14182,7 @@ static void i40e_remove(struct pci_dev *pdev)
 	mutex_destroy(&hw->aq.asq_mutex);
 
 	/* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
+	rtnl_lock();
 	i40e_clear_interrupt_scheme(pf);
 	for (i = 0; i < pf->num_alloc_vsi; i++) {
 		if (pf->vsi[i]) {
@@ -14190,6 +14191,7 @@ static void i40e_remove(struct pci_dev *pdev)
 			pf->vsi[i] = NULL;
 		}
 	}
+	rtnl_unlock();
 
 	for (i = 0; i < I40E_MAX_VEB; i++) {
 		kfree(pf->veb[i]);
@@ -14401,7 +14403,13 @@ static void i40e_shutdown(struct pci_dev *pdev)
 	wr32(hw, I40E_PFPM_WUFC,
 	     (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
 
+	/* Since we're going to destroy queues during the
+	 * i40e_clear_interrupt_scheme() we should hold the RTNL lock for this
+	 * whole section
+	 */
+	rtnl_lock();
 	i40e_clear_interrupt_scheme(pf);
+	rtnl_unlock();
 
 	if (system_state == SYSTEM_POWER_OFF) {
 		pci_wake_from_d3(pdev, pf->wol_en);